cclite is a lightweight implementation of a community currency registry for local exchange trading systems (LETS) and other alternative money systems. It uses multi-registry, multi-currency, Web-services-based (SOAP) transactions, and is templated to give multi-lingual properties. As of 2009, it has an SMS interface and versions for Debian, cpanel-based, Fedora and Windows XP. As of 2012 it has decimal currencies, templates for many languages, and a REST-style interface for integration with CMS and social networking software.

Dolibarr is a simple Web application with ERP and CRM capabilities. It is designed for small and medium companies, freelancers or foundations, and can be used to deal with all things you require to manage your activities, such as management of products, stocks, commercial proposals, invoices, orders, members of a foundation, and mailings. A single executable that installs the server and database
is available for people with no technical knowledge.

LIMA-CALLAO is an enterprise accounting program
that respects the conventions and standards
imposed by French law to businesses. It consists
of an accounting engine (CALLAO) and a user
interface for that engine (LIMA).

OTS is an easy program for calculating personal income tax form entries and taxes-owed or refund due. It handles forms such as US-Fed-1040, with Schedules A, B, C, and D, forms 8829 and 8849, AMT worksheets, and state income taxes for several large states.

Fanurio is a time tracking and billing application
designed to help freelancers manage their work and
be paid for it. You can organize your work per
client using projects, mark invoices as paid and
track the overdue ones, mark your work as billable
(flat rate, hourly rate) or non-billable, create
partial invoices at any time during the project,
create invoices for single or multiple projects,
customize invoice templates using your own
layouts, import clients from other applications by
means of a CSV file, export data to a CSV or Excel
file, and create backup copies of your data.

LedgerSMB is an accounting and ERP framework which aims to provide solid accounting, industry-leading security, and support for rapid development of business tools re-using accounting logic to support workflows of any specific business.